| Title | Date | Type | Setname | ||
|---|---|---|---|---|---|
| 301 |
 |
Black Phoebe | Sound | uu_wss | |
| 302 |
 |
Black Rail 4 | 2007-04-28 | Sound | uu_wss |
| 303 |
|
Black Rail 5 | 2008-05-04 | Sound | uu_wss |
| 304 |
|
Black Rail 6 | 2008-05-04 | Sound | uu_wss |
| 305 |
 |
Black Scoter | Sound | uu_wss | |
| 306 |
 |
Black Skimmer | Sound | uu_wss | |
| 307 |
 |
Black Tern | Sound | uu_wss | |
| 308 |
 |
Black Turnstone | Sound | uu_wss | |
| 309 |
 |
Black-bellied Plover | Sound | uu_wss | |
| 310 |
 |
Black-billed Magpie 1 | Sound | uu_wss | |
| 311 |
|
Black-billed Magpie 2 | Sound | uu_wss | |
| 312 |
|
Black-chinned Sparrow | Sound | uu_wss | |
| 313 |
 |
Black-necked Stilt | Sound | uu_wss | |
| 314 |
 |
Black-tailed Gnatcatcher | Sound | uu_wss | |
| 315 |
|
Black-throated Blue Warbler 1 | 2005-05-05 | Sound | uu_wss |
| 316 |
|
Black-throated Blue Warbler 2 | 2007-05-24 | Sound | uu_wss |
| 317 |
|
Black-throated Blue Warbler 3 | 2007-06-11 | Sound | uu_wss |
| 318 |
|
Black-throated Blue Warbler 4 | 2007-06-12 | Sound | uu_wss |
| 319 |
|
Black-throated Blue Warbler 6 | 2008-06-20 | Sound | uu_wss |
| 320 |
|
Black-throated Blue Warbler 7 | 2008-06-20 | Sound | uu_wss |
| 321 |
|
Black-throated Blue Warbler 8 | 2008-06-20 | Sound | uu_wss |
| 322 |
 |
Black-throated Sparrow | Sound | uu_wss | |
| 323 |
 |
Blackpoll Warbler | Sound | uu_wss | |
| 324 |
 |
Blue-winged Teal 1 | Sound | uu_wss | |
| 325 |
|
Blue-winged Teal 2 | Sound | uu_wss |